textarea {
    /* 不允许拖动 */
    resize: none;
    width: 251px;
    height: 178px;
    margin-top: 30px;
    margin-left: 20px;
    padding: 20px;
    font-size: 20px;
    font-weight: bold;
    position: relative;
    /* 随文本自适应大小 */
    overflow: auto;
}

button {
    position: absolute;
    width: 100px;
    height: 50px;
    margin-top: 109px
    
}

textarea:hover {
    background-color: #f5f5f5;
}
a{
    text-decoration: none;
    color: 4007a2;
    position: absolute;
}
a:hover{
    text-decoration: underline;
}